Cumulative Stress Across the Life Course and Biological Aging in Adulthood

OBJECTIVE

Psychosocial stressors have been linked with accelerated biological aging in adults; however, few studies have examined stressors across the life course in relation to biological aging.

METHODS

In 359 individuals (57% White, 34% Black) from the Child Health and Development Studies Disparities study, economic (income, education, financial strain), social (parent-child relations, caretaker responsibilities) and traumatic (death of a sibling or child, violence exposure) stressors were assessed at multiple time points (birth and ages 9, 15, and 50 years). Experiences of major discrimination were assessed at age 50. Life period stress scores were then assessed as childhood (birth-age 15 years) and adulthood (age 50 years). At age 50 years, participants provided blood samples, and DNA methylation was assessed with the EPIC BeadChip. Epigenetic age was estimated using six epigenetic clocks (Horvath, Hannum, Skin and Blood age, PhenoAge, GrimAge, Dunedin Pace of Aging). Age acceleration was determined using residuals from regressing chronologic age on each of the epigenetic age metrics. Telomere length was assessed using the quantitative polymerase chain reaction-based methods.

RESULTS

In linear regression models adjusted for race and gender, total life stress, and childhood and adult stress independently predicted accelerated aging based on GrimAge and faster pace of aging based on the DunedinPace. Associations were attenuated after adjusting for smoking status. In sex-stratified analyses, greater childhood stress was associated with accelerated epigenetic aging among women but not men. No associations were noted with telomere length.

CONCLUSIONS

We found that cumulative stressors across the life course were associated with accelerated epigenetic age, with differences by sex (e.g., accelerated among women). Further research of this association in large and diverse samples is needed.

The Effect of Individual or Study-Wide Report-Back on Knowledge, Concern, and Exposure-Reducing Behaviors Related to Endocrine-Disrupting Chemicals

BACKGROUND

To make informed decisions about endocrine-disrupting chemicals (EDCs), people need functional understanding of exposures and health and an ability to act on their knowledge. The return of biomonitoring results is an opportunity to educate people about EDCs and motivate exposure reduction.

OBJECTIVES

This study investigates environmental health knowledge about EDCs, concerns about health effects, and exposure-reducing behaviors before and after the return of individual-level exposure results or only study-wide results.

METHODS

Women in the Child Health and Development Studies who were biomonitored for 42 EDCs were randomly assigned to receive a report with personal chemical results or only study-wide findings. We interviewed participants before and after report-back about their knowledge and concerns about EDCs and how frequently they performed exposure-related behaviors. We investigated baseline differences by education and race and examined changes after report-back by race and report type.

RESULTS

Participants (n = 135 ) demonstrated general understanding of exposure pathways and health impacts of EDCs. For 9 out of 20 knowledge questions, more than 90% of participants (n ≥ 124 ) gave correct responses at baseline, including for questions about chemicals' persistence in the body and effects of early-life exposure. Most participants held two misconceptions-about chemical safety testing in the United States and what doctors can infer from EDC results-although errors decreased after report-back. Initially, concern was higher for legacy pollutants, but report-back increased concern for consumer product chemicals. After report-back, participants took some actions to reduce exposures, particularly to per- and polyfluoroalkyl substances, and total behavior was associated with knowledge and concern but not race, education, or report type.

DISCUSSION

This study demonstrated that participants had foundational knowledge about EDCs and that report-back further built their environmental health literacy. We conclude that future communications should target misconceptions about chemicals regulation in the United States, because information about regulations is crucial for people to evaluate risks posed by consumer product chemicals and decide whether to engage with public policy. https://doi.org/10.1289/EHP12565.

Racial socialization and discrimination-related psychological distress in middle-aged Black men and women

Our objectives were to evaluate gender-specific associations of racial discrimination with psychological sequelae among middle-aged Blacks and to evaluate the capacity of racial socialization to moderate the association between discrimination and psychological distress, accounting for relevant prospectively assessed childhood factors. We used data from the Child Health and Development Disparities Study that followed a Northern California-based group of Blacks from the prenatal period through midlife (N = 244, 49.6% female). Multiple regression analyses were performed separately by gender to assess (a) the main effects of racial socialization and racial discrimination on adult psychological distress, (b) racial socialization as a moderator of the association between racial discrimination and adult psychological distress, and (c) whether controls for prospectively assessed childhood factors changed conclusions regarding the role of racial socialization. Seventy percent of the middle-aged Blacks in our sample reported having at least one type of major experience of racial discrimination. Increased reports of racial discrimination were positively associated with psychological distress in men, but not in women. Similarly, racial socialization was associated with decreased overall distress for men, but not for women. Discrimination-related distress was attenuated for men who reported higher levels of racial socialization. These findings remained after adjustment for childhood socioeconomic status (SES), childhood internalizing symptoms, parental marital separation, and number of siblings. Findings suggest that racial socialization conferred a protective psychological effect through midlife to Black men who experienced racial discrimination, a commonplace experience in this cohort. (PsycInfo Database Record (c) 2023 APA, all rights reserved).

Exposome Epidemiology for Suspect Environmental Chemical Exposures during Pregnancy Linked to Subsequent Breast Cancer Diagnosis

Breast cancer is now the most common cancer globally, accounting for 12% of all new annual cancer cases worldwide. Despite epidemiologic studies having established a number of risk factors, knowledge of chemical exposure risks is limited to a relatively small number of chemicals. In this exposome research study, we used non-targeted, high-resolution mass spectrometry (HRMS) of pregnancy cohort biospecimens in the Child Health and Development Studies (CHDS) to test for associations with breast cancer identified via the California Cancer Registry. Second (T2) and third (T3) trimester archival samples were analyzed from 182 women who subsequently developed breast cancer and 384 randomly selected women who did not develop breast cancer. Environmental chemicals were annotated with the Toxin and Toxin-Target Database (T3DB) for chemical signals that were higher in breast cancer cases and used with an exposome epidemiology analytic framework to identify suspect chemicals and associated metabolic networks. Network and pathway enrichment analyses showed consistent linkage in both T2 and T3 to inflammation pathways, including linoleate, arachidonic acid and prostaglandins, and identified new suspect environmental chemicals associated with breast cancer, i.e., an N-substituted piperidine insecticide and a common commercial product, 2,4-dinitrophenol (DNP), linked to variations in amino acid and nucleotide pathways in T2 and benzo[a]carbazole and a benzoate derivative linked to glycan and amino sugar metabolism in T3. The results identify new suspect environmental chemical risk factors for breast cancer and provide an exposome epidemiology framework for discovery of suspect environmental chemicals and potential mechanistic associations with breast cancer.

Comparing different operationalizations of allostatic load measured in mid-life and their patterning by race and cumulative life course socioeconomic status

Since its conceptualization, there has been a lack of consensus on the best way to operationalize allostatic load (AL). As a marker of the cumulative, physiological wear and tear on the body resulting from chronic exposure to stressors, it follows that AL should be higher among people who have faced more stressful life experiences. Thus, the purpose of this study was to construct AL scores using different operationalizations and, as a measure of construct validity, compare whether each construction produced expected disparities in AL by race and a composite socioeconomic status (SES) variable which accounts for measures over the life course; we also explored differences by sex. We conducted the study in a sample of 45-52-year-old offspring from the Child Health and Development Studies, a longitudinal birth cohort established in the early 1960s. AL scores were constructed in 6 different ways and included 10 biomarkers from inflammatory, neuroendocrine, cardiovascular, and metabolic systems. Our main approach to constructing AL was to sum across high-risk biomarker quartiles, correct for medication use, and use sex-specific high-risk quartiles for specific biomarkers. Alternative constructions did not use sex-specific quartiles and/or weighted biomarkers within subsystems and/or did not correct for medication use. We estimated differences in AL scores by race, SES, sex and their pairwise interactions. All constructions of AL, including the main approach, produced expected disparities by race (higher scores for Black vs. non-Black participants) and life course SES (higher scores for low vs. high SES participants). However, disparities by sex only emerged when the AL score was constructed via approaches that did not use sex-specific high-risk quartiles; for these alternative constructions, overall, female participants had higher AL scores than male participants and Black female participants had the highest AL scores in the sample. For most constructions, the pairwise interaction between sex and SES, showed a stronger disparity in AL scores between low and high-SES female compared with low- and high-SES male participants; this suggests that, in terms of lowering AL, high life course SES may be more important for female than male participants. In conclusion, our results suggest that the basic AL concept is consistently expressed in different operationalizations, making it an especially useful and robust tool for understanding disparities by race and SES.

In Utero Exposure to 17α-Hydroxyprogesterone Caproate May Contribute to Increasing Incidence Rates of Early-Onset Cancer

Background: 17α-hydroxyprogesterone caproate (17-OHPC) is a synthetic progestogen introduced in the 1950s to treat habitual and threatened abortion in pregnant women. Although 17-OHPC is still available (tradename Makena), little is known about its effects on health of adult offspring, and questions concerning safety and effectiveness remain. For example, progestogens have been implicated in cancer, and trends in the use of 17-OHPC in early pregnancy during the 1950s and 60s parallel increasing incidence rates of certain cancers in young adults, such as early-onset colorectal cancer, born during that time. Methods: We examined the effect of 17-OHPC exposure in utero on risk of cancer in adult offspring in the Child Health and Development Studies, a cohort of women receiving prenatal care between June 1959 and September 1966, with deliveries through June 1967 (n=18,751 live births excluding neonatal deaths among 14,507 mothers). Diagnosed conditions and prescribed medications were abstracted from mothers’ medical records beginning 6 months prior to pregnancy through delivery. We identified mothers who received 17-OHPC (tradenames Delalutin and Proluton) in early pregnancy, defined as day 1 - 140 of gestation. Incident cancers diagnosed in offspring through 2018 were ascertained by linkage with the California Cancer Registry. Results: Among 18,751 live births, 954 cancers were diagnosed at ages 18 - 58 years. The most frequent cancers were breast (20.9%), cervical (10.9%), colorectal (7.1%), and prostate (5.9%) cancer and melanoma (9.2%). Although few mothers (n=181, 1.0%) received 17-OHPC in early pregnancy, in utero exposure was more common in offspring diagnosed with cancer (n=18, 1.9%) compared to those without cancer (n=163, 0.9%). Conditions indicating 17-OHPC included threatened abortion (54.0%), amnionitis (9.4%), and incompetent cervix (3.0%). 17-OHPC increased risk of any cancer in offspring (OR 2.08, 95% CI 1.27, 3.40), with particularly striking associations for colorectal (OR 4.78, 95% CI 1.49, 15.41) and prostate (OR 3.83, 95% CI 0.93, 15.83) cancer. There was no association between conditions indicating 17-OHPC and risk of any cancer in offspring (threatened abortion: n=1,891 mothers, OR 1.07, 95% CI 0.87, 1.32), or with use of other progestogens within 6 months prior to pregnancy (medroxyprogesterone acetate: n=50 mothers, OR 0.38, 95% CI 0.05, 2.76). Conclusions: Findings support susceptibility of multiple organ systems to endocrine disruption during early development and risk of cancer decades later - and may partly explain increasing rates of early-onset colorectal cancer. Even before mechanisms of carcinogenesis are elucidated, caution using 17-OHPC and other endocrine-active pharmaceuticals in early pregnancy is warranted, especially in the absence of a clear short-term benefit, and given the possible effect on risk of cancer in adult offspring.

Metabolome Wide Association Study of serum DDT and DDE in Pregnancy and Early Postpartum

The advancement of high-resolution metabolomics (HRM) and metabolome-wide-association study (MWAS) enables the readout of environmental effects in human specimens. We used HRM to understand DDT-induced alterations of in utero environment and potential health effects. Endogenous metabolites were measured in 397 maternal perinatal serum samples collected during 1959-1967 in the Child Health and Development Studies (CHDS) and in 16 maternal postnatal serum samples of mice treated with or without DDT. MWAS was performed to assess associations between metabolites and p,p'-DDT, o,p'-DDT and p,p'-DDE levels, followed by pathway analysis. Distinct metabolic profiles were found with p,p'-DDT and p,p'-DDE. Amino acids such arginine had a strong association with p,p'-DDT and o,p'-DDT in both women and mice, whereas lipids and acyl-carnitine intermediates were found exclusively associated with p,p'-DDE in CHDS women indicating mitochondrial impairment. It suggests that the role of serine and fatty acid metabolism on the causal disease pathway should be examined.

Understanding mixed environmental exposures using metabolomics via a hierarchical community network model in a cohort of California women in 1960's

Even though the majority of population studies in environmental health focus on a single factor, environmental exposure in the real world is a mixture of many chemicals. The concept of "exposome" leads to an intellectual framework of measuring many exposures in humans, and the emerging metabolomics technology offers a means to read out both the biological activity and environmental impact in the same dataset. How to integrate exposome and metabolome in data analysis is still challenging. Here, we employ a hierarchical community network to investigate the global associations between the metabolome and mixed exposures including DDTs, PFASs and PCBs, in a women cohort with sera collected in California in the 1960s. Strikingly, this analysis revealed that the metabolite communities associated with the exposures were non-specific and shared among exposures. This suggests that a small number of metabolic phenotypes may account for the response to a large class of environmental chemicals.

Cognition level and change in cognition during adolescence are associated with cognition in midlife

PURPOSE

Cognitive development during adolescence affects health long term. We investigated whether level of and change in language-based cognition during adolescence are associated with cognitive performance in midlife.

METHODS

Participants were enrolled in the Child Health and Development Study and followed during midlife (47-52 years). Adolescent cognition was measured with the Peabody Picture Vocabulary Test at ages 9-11 years (PPVT-9) and 15-17 years (PPVT-15). We examined PPVT-9, as well as a PPVT change score (derived using the standardized regression-based method) in relation to midlife cognition measures of Wechsler Test of Adult Reading, Verbal Fluency, and Digit Symbol tests. Linear regression models were adjusted for childhood socioeconomic status, age, sex, race, and midlife marital status, education, and occupational score.

RESULTS

In 357 participants (52.1% female, 25.6% African American), both PPVT-9 (β [95% confidence interval [CI] = 0.26 [0.18, 0.34]) and PPVT change score (β [95% CI] = 2.03 [1.27, 2.80]) were associated with Wechsler Test of Adult Reading at midlife. PPVT-9 was associated with midlife Verbal Fluency (β [95% CI] = 0.18 [0.10, 0.25]), whereas PPVT change score was not (β [95% CI] = -0.01 [-0.68, 0.67]). Neither PPVT-9 nor PPVT change score was associated with midlife Digit Symbol.

CONCLUSIONS

Both level of and change in language-based cognition during adolescence were associated with midlife vocabulary and language function, even after controlling for midlife occupation and education.

Prepregnancy overweight and obesity are associated with impaired child neurodevelopment

The authors examined the relationship of prepregnancy body mass index (BMI) and gestational weight gain (GWG) with child neurodevelopment. Mother-child dyads were a subgroup (n = 2,084) of the Child Health and Development Studies from the Oakland, California, area enrolled during pregnancy from 1959 to 1966 and followed at child age 9 years. Linear regression was used to examine associations between prepregnancy BMI, GWG, and standardized Peabody Picture Vocabulary Test and Raven Progressive Matrices scores and to evaluate effect modification of GWG by prepregnancy BMI. Before pregnancy, 77% of women were normal weight, 8% were underweight, 11% were overweight, and 3% were obese. Associations between GWG and child outcomes did not vary by prepregnancy BMI, suggesting no evidence for interaction. In multivariable models, compared to normal prepregnancy BMI, prepregnancy overweight and obesity were associated with lower Peabody scores (b: -1.29; 95% CI [-2.6, -0.04] and b: -2.7; 95% CI [-5.0, -0.32], respectively). GWG was not associated with child Peabody score [b: -0.03 (95% CI: -0.13, 0.07)]. Maternal BMI and GWG were not associated with child Raven score (all P >0.05). Maternal prepregnancy overweight and obesity were associated with lower scores for verbal recognition in mid-childhood. These results contribute to evidence linking maternal BMI with child neurodevelopment. Future research should examine the role of higher prepregnancy BMI values and the pattern of pregnancy weight gain in child cognitive outcomes.

Hydroxylated polychlorinated biphenyl metabolites (OH-PCBs), maternal smoking and size at birth

In a sample of 442 births from the Child Health and Development Studies cohort, we examined associations between maternal prenatal exposure to hydroxylated polychlorinated biphenyl metabolites (OH-PCBs) and pregnancy outcomes, and whether associations were mediated by maternal thyroid hormone levels and/or modified by maternal smoking. Compared to nonsmokers, smokers had twice the mean concentration of 4-OH-CB107 (p<0.001) and lower levels of its parent compound, PCB118 (p=0.001). Among mothers who smoked, the birth weight of newborns with maternal concentrations of 4-OH-CB107 in the upper quartile was 316g lighter (95% confidence interval (CI) 566, 65) compared to those with maternal concentrations in the lowest quartile, after control for PCB118 and other potential confounders. This association was not observed for non-smoking mothers and was not mediated by maternal thyroid hormone levels. Maternal prenatal 4-OH-CB107 levels appear to be influenced by maternal smoking and contribute to lower birth weight among smokers.

Abstract P3-07-35: Findings from the first prospective womb to breast cancer study: New gestational biomarkers support proof of concept that gestation is a window of susceptibility for the breast

Rationale. Here we provide the first prospective evidence for proof of concept that gestation is an important window of susceptibility for breast cancer. These findings could open the field to interdisciplinary investigation of mechanisms, and interventions via clinical and experimental science.

Objective. We tested the hypothesis that biomarkers in gestation predict early-onset breast cancer. Data were prospectively collected including maternal and paternal peri-conceptual body mass, tobacco and alcohol use, maternal pregnancy weight gain, pregnancy complications and outcomes, placental morphology assessed by a standardized examination at birth, and environmental chemicals recently assayed in archived maternal perinatal serum samples. This investigation was based on the observation of 20,000 pregnancies beginning in 1959, with surveillance for both maternal (F0) and offspring (F1) cancer in the Child Health and Development Studies pregnancy cohort. This report is based on the first 133 breast cancer cases in F1 that occurred from 1992-2012, diagnosed at ages 32 to 52.

Results. We observed gestational biomarkers of breast cancer risk which were independent of maternal history of breast cancer and race. Highlights of significant findings include independent, higher risk for women who: were born to mothers who lost weight during pregnancy (3-fold increase in risk, p&lt;0.03), were growth retarded in utero (3-fold increased risk, p&lt;0.01), were born with thick (p&lt;0.01), but small diameter placentas (p&lt;0.04), whose mothers had higher perinatal serum levels of environmental chemicals including o,p'-DDT (2.5-fold increase in risk for upper quartile, p&lt;0.03), perfluorooctanesulfonic acid (PFOS) precursors (p&lt;0.03) and total cholesterol (p&lt;0.04). Maternal floor infarction of the placenta was a protective factor both for mothers and their daughters. In ancillary studies we observed that F1 breast density at mid-life is also impacted by placental morphology during F1 gestation.

Conclusions. Here we provide a high level of evidence for the existence of gestational biomarkers for breast cancer. Prospective design and direct clinical observation of pregnancies eliminates reporting and misclassification bias. Findings extend the discussion of gestational biomarkers beyond birthweight and pre-eclampsia which have been previously reported. The importance of the gestation window for breast cancer in humans is in line with toxicological evidence in animal models and strongly suggests the existence of opportunities for primary prevention beginning before birth.

Citation Format: Barbara Cohn, Nickilou Krigbaum, Lauren Zimmermann, Piera Cirillo. Findings from the first prospective womb to breast cancer study: New gestational biomarkers support proof of concept that gestation is a window of susceptibility for the breast [abstract]. In: Proceedings of the Thirty-Seventh Annual CTRC-AACR San Antonio Breast Cancer Symposium: 2014 Dec 9-13; San Antonio, TX. Philadelphia (PA): AACR; Cancer Res 2015;75(9 Suppl):Abstract nr P3-07-35.

The impact of professional liability on dermatologists

Familiarity with and adherence to the above principles may not make you claim- or judgment-proof, but they should improve patient care in your office and decrease your exposure to medicolegal interventions. Always bear in mind that medical practice is not a right conferred upon you by virtue of your medical degree, but rather a privilege granted you by state statute and licensure. Inherent in this privilege are the following: 1. That you remain familiar with and comply with all state and federal laws governing the practice of medicine. 2. That you remain current in your continuing medical education, quality assurance, and loss prevention. 3. That you possess and exercise that degree of skill and learning commonly possessed and exercised by some physicians of your specialty in the same or similar communities at the same point in time. 4. That you maintain a valid license, DEA registration, and appropriate hospital credentialing.

The need for tail coverage in medical malpractice insurance

In today's litigious society, it is more important than ever that physicians purchase "tail" coverage--that is, insurance for claims asserted after the period covered by their basic insurance arising from occurrences during the insured period. This article describes the tail of a medical malpractice insurance policy, the need for and purpose of tail coverage, the methods of pricing such coverage, and the problems associated with the tail coverage provisions of medical professional liability insurance.

Facing the powers that be

Lobbyists, entrenched forces in congress and self-interested friends will try to stymie Clinton's efforts. A look at four key arenas of combat.

Office malpractice pitfalls

Familiarity with and adherence to the above principles may not make you claim or judgment proof, but they should improve patient care in your office and decrease your exposure to medico-legal interventions. Always bear in mind that medical practice is not a right conferred upon you by virtue of your medical degree, but rather a privilege granted you by state statute and licensure.

The great radicular artery of Adamkiewicz in man. Demonstration of a possibility to predict its functional territory

A women in her early sixties suffered from a malignant intramedullary astrocytoma. It had caused a nearly complete neurological deficit extending from the 12th thoracic segment downward. Since progressive tumour growth caused excruciating pain it was decided to remove the tumorous non-functional part of the spinal cord. As the great radicular artery was located in the region of the tumour it was feared that it might have to be sacrificed during surgery. In order to be informed as to its vascularization and the clinical consequence of interrupting it, an anaesthetic agent (Etomidate) was injected through this vessel. This resulted in a temporary increase in the neurological deficit by two dermatomes. Fortunately during surgery the Adamkiewicz artery was preserved. This intervention completely abolished the patient's complaints.

Pseudolymphoma presenting as a cecal tumor

A 7-yr-old with abdominal pain and melena had a barium enema which revealed a cecal lesion that proved to be a pseudolymphoma of the cecum and appendix--a site not previously reported.